In this case town was in die straights. So scum was on the wagon or they weren’t. If scum wasn’t on the wagon then that means that they have to be on the other main wagon rather heavily as there were no nullvoters. When looking at the other wagon and how it wasn’t pushed means scum were pushing this one or we all around inactive.

However the all around inactive fell by the wayside as the people both pushing mislynches and not allowing lynches on certain people (you and Alice) combined with the rule of three meant one of you

It’s more of looking at the votes and seeing what matches reality.

If the reality is scum are doing very very good then there will be a scum on it so town doesn’t catch on
If scum are doing very very bad then there is likely a scum busser